<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>

</body>
<script>
	// “ == ” 运算符将原始值和其包装对象视为相等，“ === ”全等运算符则视为不等。
	// let userName = "zhangsan";
	// let userName2 = new String("zhangsan");
	// console.log(userName == userName2);// true
	// console.log(userName === userName2);// false


</script>
</html>